15640261

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:641

約数の個数: 24

約数和(自身を含む): 20084064

約数和(自身を除く): 4443803

約数列:

[1, 7, 13, 43, 49, 91, 301, 559, 571, 637, 2107, 3913, 3997, 7423, 24553, 27391, 27979, 51961, 171871, 319189, 363727, 1203097, 2234323, 15640261]

約数ペア:

[(1, 15640261), (7, 2234323), (13, 1203097), (43, 363727), (49, 319189), (91, 171871), (301, 51961), (559, 27979), (571, 27391), (637, 24553), (2107, 7423), (3913, 3997)]